Really really slow query. What's a better way?
Brendan Duddridge <brendan@clickspace.com>
From: Brendan Duddridge <brendan@clickspace.com>
To: PostgreSQL Performance <pgsql-performance@postgresql.org>
Cc: Tony Copping <tony@clickspace.com>
Date: 2006-02-24T06:54:45Z
Lists: pgsql-performance
Hi, We're executing a query that has the following plan and we're wondering given the size of the data set, what's a better way to write the query? It's been running since 2pm 2 days ago. explain DELETE FROM cds.cds_mspecxx WHERE ProdID not in (SELECT stage.ProdID FROM cds_stage.cds_Catalog stage where stage.countryCode = 'us') and countryCode = 'us'; QUERY PLAN ------------------------------------------------------------------------ --------------------------- Index Scan using pk_mspecxx on cds_mspecxx (cost=53360.87..208989078645.48 rows=7377879 width=6) Index Cond: ((countrycode)::text = 'us'::text) Filter: (NOT (subplan)) SubPlan -> Materialize (cost=53360.87..77607.54 rows=1629167 width=12) -> Seq Scan on cds_catalog stage (cost=0.00..43776.70 rows=1629167 width=12) Filter: ((countrycode)::text = 'us'::text) (7 rows) Thanks, ____________________________________________________________________ Brendan Duddridge | CTO | 403-277-5591 x24 | brendan@clickspace.com ClickSpace Interactive Inc. Suite L100, 239 - 10th Ave. SE Calgary, AB T2G 0V9 http://www.clickspace.com